Dimitar Stoynov, 35, who is the driver largely blamed for the head-on collision that injured Bulgarian Transport Minister, Ivaylo Moskovski, has tested negative for DUI.

The news was reported Saturday by Darik radio, citing doctors from the hospital in the northwestern city of Lovech, where all injured were initially listed for treatment. They are all reported in stable condition.

In the Friday incident, a Volkswagen Golf, driven by Stoyanov on a two-line road, attempted to pass three cars and truck, causing a head-on collision with the automobile where Moskovski and his Chief of Staff, Angelina Toteva, were riding.

Moskovski, Toteva and the Minister's driver, who sustained the most serious injuries and underwent leg surgery, were transported to the hospital in Lovech and later to Sofia.

Stoyanov had also sustained light leg injuries, but has refused hospital care.

Moskovski was on his way to inspect the ongoing repair works of the railway station in the village of Plachkovtsi that was destroyed in a fire in January.

He was also expected to take part in a roundtable discussion on industry in the town of Gabrovo.

The main I-14 road was closed for traffic for hours Friday.